Which of the Following Describes Using a Retest Estimate to Assess

Which of the following describes using a retest estimate to assess reliability?

A) administer the same test to different people and compare test scores of the different people
B) administer different tests to different people and compare test scores of the different people
C) administer the same test to the same people at two different points in time and compare their test scores at time 2 with the scores at time 1
D) administer a test with content based on what a person actually needs to know to do the job in question well
E) administer a test with x number of item designed to assess a topic; then statistically analyze the degree to which responses to the items vary together